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Predicting Low Toxicity and Scalable Solvent Systems for High‐Speed Roll‐to‐Roll Perovskite Manufacturing

Richard Swartwout Orcid Logo, Rahul Patidar, Emma Belliveau, Benjia Dou, David Beynon Orcid Logo, Peter Greenwood, Nicole Moody, Dane deQuilettes, Moungi Bawendi, Trystan Watson Orcid Logo, Vladimir Bulovic

Solar RRL, Volume: 6, Issue: 3, Start page: 2100567

Swansea University Authors: Rahul Patidar, David Beynon Orcid Logo, Peter Greenwood, Trystan Watson Orcid Logo

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DOI (Published version): 10.1002/solr.202100567

Abstract

Printed lead‐based perovskite photovoltaics (PV) have gained interest due to their potential to be manufactured with scalable roll‐to‐roll techniques. In industrial scale‐up, toxicity of inks can constrain roll‐to‐roll manufacturing due to the added cost of managing toxic effluents. Due to solvent t...

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Published in: Solar RRL
ISSN: 2367-198X 2367-198X
Published: Wiley 2022
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa58571
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Abstract: Printed lead‐based perovskite photovoltaics (PV) have gained interest due to their potential to be manufactured with scalable roll‐to‐roll techniques. In industrial scale‐up, toxicity of inks can constrain roll‐to‐roll manufacturing due to the added cost of managing toxic effluents. Due to solvent toxicity, few perovskite solution chemistries in published works are scalable to gigawatt production capacity at low cost. Herein, it is shown that for scalable PV production, the use of aprotic polar solvents should be avoided due to their overall toxicity. Compliance with worldwide worker safety regulations for solvent exposure limits could require additional air handling requirements for some solvents, which in turn would affect cost‐effectiveness. It is shown that costs associated with handling of hazardous substances can be significant and estimate an added cost of ¢3.7/W for dimethylformamide (DMF)‐based inks. To solve this problem, a new perovskite ink solvent system is developed that is composed entirely of ether and alcohol, which has an effective exposure limit 14× higher than DMF, making it suitable for industrial coating processes. It is shown that the new ink solvent system is capable of fabricating high‐efficiency perovskite solar cells processed in 1 min on a standard roll‐to‐roll system.
Keywords: perovskites, roll-to-roll manufacturing, solvents, toxicity
College: College of Engineering
Funders: Horizon 2020 Grant: 764787
Issue: 3
Start Page: 2100567